Rock crusher jaw



Nov. 10, 1964 K. v. LUTZ xocx CRUSHER JAW Filed Dec. 9, 1963 INVENTOR.KENNE7H b.Ll/TZ United States Patent 3156,421 ROCK CRUSHER JAW Kennetl'mV. Latz, 10081 Cannen Road,Cupertino, Calif. Fled Dec. 9, 1963, Sex. N0.329,097 6 Claims. (C1. 241-217) The present invention relates in generalto rock crushers and more particularly to a rock crusher jaw.

Rocks being crushed by conventional crusher jaws have a tendency to Slipduring the crushing operation or to be ejected from the crusher jawprior to being fractured. As a consequence thereof, the quantity offractures of rock per stroke is lessened.

Furthermore, there is a tendency in rock crusher jaws to have uneven andexcessive wear. A reason for this is that generally rocks do not beginto be fractured as soon as they enter the crusher jaws.

Accordingly, an object of the present invention is to provide rockcrusher jaws that are more efiicient, increase the qnantity of fracturesof rock per stroke and also provide a finer crushing action.

Another object of the present invention is to provide a. rock crusherjaw that reduces the slippage of rock being crushed Within the jaw,minimizes the ejection of rock frorn the crusher jaw prior to beingfractured and also provides for a crushing action as soon as the rockenters the jaw.

Another object of the present invention is to provide rock crusher jawsthat have improved crushing action and also have greater durability Withmore uniform Wear.

Another object of the present invention is to provide roek crusher jawsthat increase the quantity of rock fractured per stroke, improve thecompaction quality of the crushed rock and produce finer crushing ofrock.

Another object of the present invention is to provide an improved rockcrusher jaw.

Another object of the present invention is to reduce work hazards byproviding a crusher jaw that minimizes the projection of rockstherefrom.

Another objeot of the present invention is to reduce the operating costsof rock crushers by providing crusher jaws with improved productioncapacity, greater elficiencyin crushing rocks and greater durabilityWith rnore uniform wear.

Another object of the present invention is to provide a rock crusner jaWwherein rock is fractured as s0on as it enters the jaw, therebyresulting in more uniform jaw Wear and a finer crushing action.

Another object of the present invention is to provide a rock crusher jawWith increased crushing area to minimize the Wear thereof.

Another object of the present invention is to provide rook crusher jawsWith reduced snrface flow of metal and distortion Within the crusherapparatus.

Another object of the present invention is to providd a rock crusher jaWwith improved gripping action and comtinued cleavage after the wearingof the teeth thereof.

Other and further objects and advantages of the present invention willbe apparent to one skilled in the art from the following descriptiontaken in conjunction With the accompanying drawings, in Whicl1:

FIG. 1 is a perspective view of a rock crusher employing the crusher jawof the present invention.

FIG. 2 is a diagnammatic vertical section taken along line 22 of FIG. 1.

FIG. 3 is an enlarged perspective view of the movable crusher plate forthe crusher jaw of the present invention.

FIG. 4- is an enlarged perspective view of the stationary crusher platefor the crusher jaw of the present invention.

FIG. 5 is a fragmentary elevation view of the crusher jaw teeth of thepresent invention taken substantially along line 55 0f FIG. 3.

Illustrated in FIGS. 1 and 2 is a conventional jaw crusher 10 of thetype manufactured by the Iowa Manufacturing Company, which is snitablefor employing the rock crusher jaw 11 of the present invention. Otherjaw crushers, such as the well-known Blake type, Dodge type orcornbinations thereof, are equally applicable and suitable for employingthe crushing jaw 11 of the present invention.

Briefly, the jaw crusher 10 comprises an eccentric shaft 12 (FIG. 2).Fixed to the shaft 12 are flywheels 13 and 14 (FIGS. 1 and 2). Adjacentone of the flywheels and secured to the shaft 12 is a pulley, not shown,which has a belt, not shown, trained therearound. The belt is driven bysuitable drive rneans, not shown, to cause the pulley to rotate theeccentric drive shaft 12. A moving jaw wedge 15 (FIG. 2) is actuated bythe eccentric shaft 12. Connected to the jaw wedge 15 is a toggle plate16, which is also attached to a push wedge 17. Adjacent the push Wedge17 is a pull wedge 18.

Secured to the moving jaw wedge 15 is a movable jaw crusher plate 20(FIG. 2). Adjacent and confronting the movable jaw crusher 20 is astationary jaw crusher plate 21. The movable jaw crusher plate 20 andthe stationary jaw crusher plate 21 comprise the crusher jaw 11 of thepresent invention.

Rock is fed into a feed hopper o1 inlet 23 (FIGS. 1

and 2) and passes between the movable jaw plate 20 and the stationaryjaw plate 21. Horizontal and vertical action of the movable jaw plate 20fractures the rock Within the crusher javv 11. The forward and downwardmovement of the movable jaw plate 20 forces the fractured rock to bedischarged through an outlet 24 (FIG. 2). The movable jaw plate 20(FIGS. 2 and 3), which is made of suitable material, such as manganesesteel, is in the form of a rectangular solid. As shown in FIG. 3 themovable jaw plate 20 comprises longitudinal side walls 25 and 26,transverse end Walls 27 and 28, a rear surface 20 and a rock engagingsurface 30. The plate 20 seats securely Within the movable wedge 15(FIG. 2) with the rear surface 29 resting against the wedge 15 and Withthe rock engaging: surface 30 exposed. The transverse end walls 27 and28 extend in the general direction of inclination of the movable wedge15 (FIG. 2) and the longitudinal side Walls 25 and 26 extendperpendicular to the general direction of inclination of the movablewedge 15 (FIG. 2).

According, to the pr6sent invention, the rock-engaging surface of themovable crusber plate 20 cornprises a plurality of transversely disposedridges 31. The transverse direction is shown as the heigl1t and thelongitudinal direction is shown as the Width in FIG. 3. Successiveridges 31 are spaced an equal distance apart in the longitudinaldirection of the plate 20. Bach ridge 31 has a zig-zag configuration asit extends transversely of the plate 20. The angle at the zig-zag bend(FIG. 3) is preferably Within the range of 10-25. lt has been found thatan angle in excess of 25 tends to retard the discharge of the rock andhold the saure back to reduce the production output. An angle less than10 is not as effective to reduce slippage and premature ejection ofrocks. The cross-sectional areas of the ridges 31 are substantiallytrapezoidal. As shown in FIG. 3, the peaks 31a of the ridges 31 arecoplanar and the bases 31b of the ridges 31 are coplanar. Confrontingangular side walls 31c of successive ridges 31 forrn channels 32. Eachchannel 32 has a zig-zag configuration as it extends transversely of theplate 20. Successive channels 32 are spaced an equal distance apart inthe longitudinal dire'ction of the plate 20.

The channels 32 are relatively deep. The height of the channel 32 isgreater than the Width of the peak 31a of the ridge 31. As viewed inFIG. 5, the Width of the peak 31a is X and the height of the channel 32is Y. Y in the =J present invention is greater than the dimension of X.It is also to be observed that the respective sides 31c of the channel32 are in a plane or straight line until the bed of the channel 32 isreached. At the bed thereof, the channel 32 is arcuate.

Tl1e stationary jaw plate 21, which is made of suitable material, suchas manganese steel, is in the forrn of a reotangular solid. Asillustrated in FIGS. 2 and 4, the stationary jaw plate 21 compriseslongitudinal side Walls 40 and 41, transverse and Walls 42 and 43, arear surface 44, and a rock-engaging surface 45. The stationary plate 21is fixedly secured to the housing of the jaw crusher (FIG. 2) With therear surface 44 contacting the l1ousing and With the rock-engagingsurface 45 exposed and coufronting the rock-engaging surface 30 of themovable jaw plate 20.

As illustrated in FIG. 4, the rock-engaging surface 45 of the stationaryjaw plate 21 comprises a plurality of transversely disposed ridges 46.The transverse direction is shown as the height and the longitudinaldireotion as the width in FIG. 4. Successive ridges 46 are spaced anequal distance apart in the longitudinal direction of the stationaryplate 21. Each ridge 46 has a zig-zag configuration as it extendstransversely of the plate 21. The angle at the zig-zag bend (FIG. 4) ispreferably Within the range of 10-25. It has been found that an angle inexcess of 25 tends to retard the discharge of the rock and hold the sameback to reduce the production output. An angle of lass than 10 is not asetfective to reduce alippage and premature ejection of rocks. Thecross-sectional areas of the ridges 45 are substantially trapezoidal.The peaks 46a of the ridges 46 are coplauar and the bases 46b of theridges 46 are coplanar. Confronting angular side Walls 460 of successiveridges 46 forrn channels 47. Bach channel 47 has a zig-zag configurationas it extends transversely of the plate 21. Successive channels 47 arespaced an equal distance apart in the longitudinal direction of theplate 21.

According to the present invention, the channels 47 are relatively deep.The height of the channel 47 is greater than the width of the peak 46aof the ridge 46. Tl1is is considered in the manner previously describedin connection with FIG. 5. It is also to be observed that the respective sides 460 of the channel 47 are in a plane or straight lineuntil the bed of the channel 47 is reached. At the bed thereof, thechannel 47 is arcuate.

In operation, rock is fed into the hopper 23 (FIG. 2) which then passesbetween the rock-engaging surface of the movable jaw plate 20 and therock-engaging surface of the stationary jaw plate 21 of the crusher jaw11. Rock is contacted by the zig-zag ridges 31 of the movable plate 20and is engaged by the zig-zag ridges 46 of the stationary plate 21.Portions of rock may enter the zig-zag Channels 32 of the movable plate20 and the zig-zag channels 47 of the stationary plate 21. Tims, thereis an improvecl gripping and retaining action between the crusher jaw 11and the rock therein. Horizontal and vertical movernent of the movablejaw plate 20 fractures rock Within the crusher jaw 11. The forward anddownward rnovement of the rnovable jaw plate 20 forces the fracturedrock to be discharged through the outlet 24 (FIG. 2).

By providing zig-zag ridges and channels in the rockengaging surfaces ofthe movable jaw plate 20 and the stationary jaw plate 21, the tendencyof rock to Slip during the crushing stroke is reduced. Likewise, thetendency of rock to be ejected from the crusher jaw 11 prior to beingfractured is lessened. As a result thereof, the quantity of fractures ofrock per stroke is increased and the production capaoity is improved.

In addition, the zig-zag configuration for the channel and ridges tendsto improve the durability of the rock crusl1er jaw. It has also beenfound that the zig-zag comfiguration for the ridges and channels of therock crusher jaw provides a shearing action in addition to a orushing 4action to improve the operation of the jaw in crushing hard rocks. Also,it has been founcl that a finer crushing action is produced with a moreuniform and durable wear characteristics for the rock crusher jaw.

In the improved design for the configuration and coustruction of thechannels 32 and 47, it has been found that the hard rock is beingfractured as soon as it enters the jaws. This action results in moreuniform javv wear and finer crushing of the hard rock. The higher,straighter sides for the channels 32 and 47 tend to create an improvedgripping action on the hard rock Witl1 continued oleavage action evenalter the jaws are worn. Tl1e deeper valleys for the channels tend toreduce surface flow cf metal and lessen distortion of the jaws withinthe crusher apparatus.

It has also been observed that by having the zig-zag ridges and channelextend in the transverse direction as distinguished from thelongitudinal direction that the ability to discharge crushed rock hasimproved. In this regard the zig-zag ridges are spaced in thelongitudinal direction. Moreover, the flat wide peaks for the ridgesgreatly improve the wear and durability of the rock crusher jaws. Thisis accomplished by a fiat rock-engaging surface and also extra ridgemetal along the sides to compensate for conventional ridge wear.Coupiing the forward and downward rnovements of the rock crusher jawplates 20 relative to the stationary plate 21 with the zig-zagconfigurations of rock-engaging ridges thereof not only reduces slippageof the rock therebetween and the prernature ejection of rocks, but,also, improves the rock crushing eificiency on the downward stroke. T hemovable plate 20 moves downwardly and obliquely across the stationaryplate 21 to efiect a better rock crushing action in conjunction witl1the zig-zag rock-engaging surfaces thereof.

While the present invention has been described in comnection With amovable and stationary jaw crusher plate, it is apparent that theconstruction of the rock-engaging surfaces is equally applicable whenbotl1 jaw crusher plates are movable and when the orusher mechanisrn isother than a jaw and crusher units have a configuration other than thatof a plate.

It is to be understood that modifications and variations of theembocliment of the invention disclosed herein may be resorted to withoutdeparting frorn the spirit of the invention and the scope of theappended claims.

Having thus described my invention, what I claim as new and desire toprotect by Letters Patent is:

1. A hard rock crusher jaw comprising a first jaw crusher plate having arock-engaging surface, and a second jaw crusher piate having arock-engaging surfnce confronting the rock-engaging surfac-e cf saidfirst jaw crusher platte, said rock-engaging surfa-ce of said first jawcrusher plate being formed Witl1 a plurality of spaced zigzag ridgeshaving trapezoidal cross-sectional areas defining zig-zag channelstherebetween for contacting rock disposed between said first and secondjaw crushcr plates, said zig-zag ridges being formed of a series ofangular turns extending in the height direction of said first crusherplate, said zig-zag channels being iormed Will1 a deptl1 greater thanthe Widl1 of the respective rockengaging surfaces 0f the riclges havingthe trapezoidal cross-sectional a1eas.

2. A hard rock crusher jaw comprising a first jaw crusher plate having arockengaging surfaco, said rockengaging surface being forrned witl1 aplurality 02 Wide edge zig-zag ridges defining zig-zag channoisthercbetwecn for contacting rock, said zig-zag channels of said firstjaw crusher plate being f0rrned with fiat sides and with a depth greaterthan the width of the respective wide edges of the zig-zag ridges, saidzig-zag ridges being formed of a series or angular turns extending inthe height direction of said first jaw crusher platc, and a secoml javcrusher plate having a rock-engaging surface conl'ronting therock-cngaging surface of said fxrst jaw crushcr plate and said wideedges thereof, said rock-engaging surface of said second jaw crusherplate being formed with a plurality of wide edge zig-zag 1idges definingzig-zag channels therebetween for contacting rock disposed between saidfirst and second crusher plates, said Wide edges of said second jawcrusher plate being arranged to confront said rock-engaging surface ofsaid first jaw crusher plate, said zig-zag ridges on said second jawcrusher plate being formed of a series of angular turns extending in theheight direction of said second jaw crusher plate, said zig-zag channelscf said second jaw crusher plate being formed with flat sides and With adepth greater than the Width of the respective wide edges of the zig-zagridges of said second jaw crusher plate.

3. In a hard rock jaw crusher, a first jaw crusher plate having arock-engaging surface, a second jaw crusher plate having a rock-engagingsurface confronting the rockengaging surface of said first jaw crusherplate, said rockengaging surface of said first jaw crusher plate beingformed with a plurality of wide edge zig-zag ridges defining zig-zagchannels therebetween for contacting rock disposed between said firstand second jaw crusher plates, said Wide edges of said first jaw crusherplate being arranged to confront the rock-engaging surface of saidsecond jaw crusher plate, said zig-zag ridges being, formed f a seriesof angular turns extending in the transverse direction across said firstjaw crusher plate, said zig-zag channels of said first jaw crusher platebeing forrned With a depth greater than the Width of the respective wideedges of the zig-zag ridges, and means f0r imparting relative movementbetween said first and second jaw crusher plates for fracturing hardrock therebetween.

4. A hard rock crusher jaw comprising a first jaw crusher plate having arock-engaging surface With a longitudinal and transverse direction, anda second jaw crusher plate having a rock-engaging surface confronringthe rockengaging surface of said first jaw crusher plate With alongitudinal and transverse direction, said rock-engaging surface ofsaid first jaw crusher plate being formed with a plurality oftransversely disposed zig-zag ridgeg having trapezoidal cross-sectionalareas for contacting rock disposed between said first and second jawcrusher plates, each of said trapezoidal cross-sectional areas beingformed With a wide, blunt edge confronting the rock-engaging surface ofsaid second jaw crusher plate, said zig-zag riclges being formed of aseries of angular turns in the transverse direction across said firstjaw crusher plate.

5. A hard rock crusher jaw comprising a first jaw crusher plate having arock-engaging surface, and a second jaw crusher plate having arock-engaging surface confronting the rock-engaging surface cf saidfirst jaw crusher plate, said rock-engaging surface of said first jawcrusher plate being formed with a plurality of spaced zig-zag ridgesextending in the general direction of an end well of said first jawcrusher plate for contacting rock disposed between said first and secondjaw crusher plates, said zig-zag ridges being formed to project at anangle relative to said end Wall within the range of 1025 said zig-zagridges being formed cf a series of angular turns extending in thegeneral direction of the end wall of said first jaw crusher plate.

6. In a hard rock jaw crusher, a first jaw crusher plate having arock-engaging surface, a second jaw crusher plate having a rock-engagingsurface confronting the rockengaging surface of said first jaw crusherplate, said rockengaging surface of said first jaw crusher plate beingformed With a plurality of Wide edge zig-zag ridges extending in thegeneral direction of the height of said first jaw crusher plate forcontacting rock disposed between said first and second jaw crusherplates, said Wide edges of said first jaw crusher plate being arrangedto confront the rock-engaging surface of said second jaw crusher plate,said zig-zag ridges being formed With a series cf angular turnsextending in the height direction of said first jaw crusher plate, andmeans for imparting relative forward and downward movement between saidfirst and second jaw crusher plates for fracturing hard rocktherebetween.

References Cited by the Examiner UNITED STATES PATENTS l424339 8/22Green 241291 1,84-9935 3/32 Kropp 241291 2,609154 9/52 Baker 241-300FOREIGN PATENTS 281,525 6/52 Switzerland.

OTHER REFERENCES German application, 1,088,325 September l, 1960.

ANDREW R. JUHASZ, Primary Examiner.

I. SPENCER OVERHOLSER, Examiner.

1. A HARD ROCK CRUSHER JAW COMPRISING A FIRST JAW CRUSHER PLATE HAVING AROCK-ENGAGING SURFACE, AND A SECOND JAW CRUSHER PLATE HAVING AROCK-ENGAGING SURFACE CONFRONTING THE ROCK-ENGAGING SURFACE OF SAIDFIRST JAW CRUSHER PLATE, SAID ROCK-ENGAGING SURFACE OF SAID FIRST JAWCRUSHER PLATE BEING FORMED WITH A PLURALITY OF SPACED ZIGZAG RIDGESHAVING TRAPEZOIDAL CROSS-SECTIONAL AREAS DEFINING ZIG-ZAG CHANNELSTHEREBETWEEN FOR CONTACTING ROCK DISPOSED BETWEEN SAID FIRST AND SECONDJAW CRUSHER PLATES, SAID ZIG-ZAG RIDGES BEING FORMED OF A SERIES OFANGULAR TURNS EXTENDING IN THE HEIGHT DIRECTION OF SAID FIRST JAWCRUSHER PLATE, SAID ZIG-ZAG CHANNELS BEING FORMED WITH A DEPTH GREATERTHAN THE WIDTH OF THE RESPECTIVE ROCKENGAGING SURFACES OF THE RIDGESHAVING THE TRAPEZOIDAL CROSS-SECTIONAL AREAS.